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Proton Plan

Proton Plan. Eric Prebys FNAL Accelerator Division. Outline. Scope of the Plan Proton Economics and Limiting Factors Key Issues Elements of the Plan Timeline Cost Proton Projections. “Proton Plan”.

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Proton Plan

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  1. Proton Plan Eric Prebys FNAL Accelerator Division

  2. Outline • Scope of the Plan • Proton Economics and Limiting Factors • Key Issues • Elements of the Plan • Timeline • Cost • Proton Projections Proton Plan, October 12th, 2004 - Prebys

  3. “Proton Plan” • The details of proton demand and issues can be found in an official report to the director at: www.fnal.gov/directorate/program_planning/studies/ProtonReport.pdf • Working assumptions: • Existing proton source must last at least another 10 years or so in more or less it’s current configuration. • During that time, a new “proton driver” will be built, which will ultimately replace the existing proton source. • Proton source improvements should require no significant downtimes beyond those needed for other reasons. • The maximum total funding for proton source improvements will be of the order of $18M over the next few years. • Near term projects most important to performance Proton Plan, October 12th, 2004 - Prebys

  4. What Limits Total Proton Intensity? • Maximum number of Protons the Booster can stably accelerate: 5E12 • Maximum average Booster rep. Rate: currently 7.5 Hz, may have to go to 10 Hz for NuMI+ (full) MiniBooNE • (NUMI only) Maximum number of booster batches the Main Injector can hold: currently 6 in principle, possibly go to 11 with fancy loading schemes in the future • (NUMI only) Minimum Main Injector ramp cycle time (NUMI only): 1.4s+loading time (at least 1/15s*nbatches) • Losses in the Booster: • Above ground radiation • Damage and/or activation of tunnel components Our biggest worry at the moment!!!! Proton Plan, October 12th, 2004 - Prebys

  5. Key Issues • Linac • Not a performance bottleneck, but historically a reliability concern • Pulsed quad power supplies • Increased instrumentation • Booster: • Hardware improvements to increase maximum average repetition rate • A multi-pronged approach to increase aperture and efficiency • Main Injector • Aperture increases to accommodate multi-batch loading. • Increased RF to accommodate slip-stacked NuMI loading. Biggest $$$ Proton Plan, October 12th, 2004 - Prebys

  6. Plan Elements • Linac • Maintenance, Reliability, and Monitoring • Increased Instrumentation • Replace Pulsed Quadrupole power supplies • Booster • Aperture • Long 13 Modification (complete) • ORBUMP replacement • Improved Corrector System • Alignment • Longitudinal Bucket Area • Gamma-t system • Extra RF cavities • 30 Hz Harmonic • Repetition rate • RF Drift tube cooling • Feeder upgrade (deferred) • Operational advances • Beam cogging • Maintenance, Reliability, and Monitoring • Solid state RF PA’s • Improved instrumentation Proton Plan, October 12th, 2004 - Prebys

  7. Plan Elements (cont’d) • Main Injector • Aperture • Large aperture quads • Longitudinal Bucket Area • Dual PA RF upgrade • Operational Advances • Initial NuMI commissioning • Mixed mode operation • Full mixed mode (2+5) operation • Full slipstacked (2+9) NuMI operation • Maintenance, Reliability, and Monitoring • BPM Upgrade • BLM Upgrade Proton Plan, October 12th, 2004 - Prebys

  8. Important Milestones in Proton Delivery • 12/2004 – Slipstacked pBar production • 1/2005 – NuMI operation begins • 4/2005 – “2+5” pBar+NuMI operation • 11/2005 – Booster capable of 9Hz operation • 11/2006 – Main Injector RF Upgrade Complete • 4/2007 – NuMI+pBar at full 2+9 operation Proton Plan, October 12th, 2004 - Prebys

  9. Major Costs Proton Plan, October 12th, 2004 - Prebys

  10. Timeline of Key Elements Proton Plan, October 12th, 2004 - Prebys

  11. Estimating Proton Delivery • Assumptions • The hardware improvements to Booster and Main Injector take place on the time scale I have presented. • Booster loss reduction more or less keeps pace with the repetition rate increases. • There are no severe roadblocks to the operational advances in the Main Injector (multi-batch, etc) • Maximum efficient Booster batch remains 5E12 • Hopefully conservative • Total Main Injector acceleration time also remains constant • Cycle time will go to 2.3s at full NuMI operation. Proton Plan, October 12th, 2004 - Prebys

  12. Machine Capacities RF Upgrade Proton Plan, October 12th, 2004 - Prebys

  13. Machine Capacities (cont’d) ORBUMP Upgrade Proton Plan, October 12th, 2004 - Prebys

  14. Proton Projections Proton Plan, October 12th, 2004 - Prebys

  15. Improvements suggested by Alberto • Include MI BLM upgrade (currently under Run II plan). • Explicitly include larger booster batches (5.5-6E12) • Can MI accelerate 11 6E12 batches?? • Believe that after RF upgrade, MI acceleration ramp can be reduced to maintain 2 seconds rep. rate even with slipstacking (15% increase to NuMI). Proton Plan, October 12th, 2004 - Prebys

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